usb: phy: Fix compilation errors

This change fixes compilation errors as below:
1. remove usage of <linux/clk/msm-clk.h> as it is no longer available.
2. remove usage of DP_DM* enums within Linux QUSB PHY driver. call
qusb_phy_enable_power() API directly instead of qusb_phy_update_dpdm() API.
3. remove usage of <linux/usb/msm_hsusb.h> as it is no longer available.

Change-Id: I430f47bfc28f1d3f6b2d332ed63aec7042c890d4
Signed-off-by: Mayank Rana <mrana@codeaurora.org>